GB944343A - Improvements in or relating to crystallization processes - Google Patents
Improvements in or relating to crystallization processesInfo
- Publication number
- GB944343A GB944343A GB1539760A GB1539760A GB944343A GB 944343 A GB944343 A GB 944343A GB 1539760 A GB1539760 A GB 1539760A GB 1539760 A GB1539760 A GB 1539760A GB 944343 A GB944343 A GB 944343A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coolant
- liquid
- crystallized
- crystals
- miscible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0009—Crystallisation cooling by heat exchange by direct heat exchange with added cooling fluid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/14—Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
p-Xylene can be crystallized from a solution of a mixture which also contains o- and m-xylenes and ethylbenzene by direct contact with a non-miscible coolant liquid, e.g. an aqueous brine at - 40 DEG C., which has a density sufficiently different from the mother liquid for easy decantation of the mother liquors and coolant.ALSO:Concentrated solutions are crystallized by direct contact with a non-miscible, coolant liquid, which is chemically inert, does not emulsify and with a density such that the liquids can be decanted easily from the crystals. The process may be performed in an apparatus (not shown) with several compartments to which coolant can be added while the crystals and liquid move under the influence of a screw conveyer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR796718A FR1236125A (en) | 1959-06-05 | 1959-06-05 | Crystallization process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB944343A true GB944343A (en) | 1963-12-11 |
Family
ID=8715680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1539760A Expired GB944343A (en) | 1959-06-05 | 1960-05-02 | Improvements in or relating to crystallization processes |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE1221196B (en) |
| FR (1) | FR1236125A (en) |
| GB (1) | GB944343A (en) |
| NL (2) | NL128049C (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT49486B (en) * | 1910-10-01 | 1911-08-25 | Norbert Ceipek | Process and device for the production of crystals. |
| DE552584C (en) * | 1928-07-08 | 1932-06-15 | Georg Weisheit | Method and device for crystallizing salts from their solutions |
| DE817138C (en) * | 1948-10-02 | 1951-10-15 | Neuerburg Obsterei K G | Device for temperature equalization of crystals in the production of concentrates from solutions, in particular from fruit juices |
-
0
- NL NL251445D patent/NL251445A/xx unknown
- NL NL128049D patent/NL128049C/xx active
-
1959
- 1959-06-05 FR FR796718A patent/FR1236125A/en not_active Expired
-
1960
- 1960-05-02 GB GB1539760A patent/GB944343A/en not_active Expired
- 1960-06-01 DE DEA34796A patent/DE1221196B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1221196B (en) | 1966-07-21 |
| NL128049C (en) | |
| FR1236125A (en) | 1960-07-15 |
| NL251445A (en) |
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